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How to Choose Filter System for a Glass Wall Pool

Glass wall pools are a delight to look at, but they require regular maintenance so they can be healthy for swimmers. A vital part that makes it a safe environment is the filter system. As there are different filtration options, you should know how to choose filter system for a glass wall pool.

Whether you are thinking about building a pool in your backyard or already have one but need to change the filter system, this guide is for you. We will use our expertise to explain how the filtration system works and provide you with some tips on choosing the best one for your pool.

How to Choose Filter System for a Glass Wall Pool
Source: / Photo Contributor: Grand Warszawski

How to Choose Filter System for a Glass Wall Pool

The filter system is essential for clean water in your pool. It is responsible for approximately 80% of pool maintenance, while mechanical and chemical treatments do the remaining.

The water filtration equipment has several elements, such as:

  • Pump
  • Electrical cabinet
  • Filter
  • Plumbing system for water direction
  • Skimmer

All of these components should be in good condition for the filter system to work effectively. The pool filter is essential for maintaining the cleanliness of your fantastic glass wall swimming pool.

So if you are asking yourself how to choose a filter for my pool, you can find the best fit by considering several factors. To assist you in your decision-making process, we will reveal how you can choose a filter system for your pool just like we, as professionals, do.

Pool size

When choosing the filtration system, the first thing that should come to mind is the pool size. It directly influences the volume and flow rate, meaning it determines the filtration performance.

For starters, you should calculate the volume of your pool. You can get the volume in cubic feet by multiplying the pool’s surface area with the average depth. If you want to express the result in gallons, multiply the volume in cubic feet by 7.5.

Next, you should look for a filter that is capable of cleaning the entire pool volume. We recommend picking a filtration system that can clean your pool with a turnover rate of approximately eight hours.

Pool type

The type of pool you own can also help you determine the pool filter you need. Typically, residential pools are used less frequently and have different filtration needs than commercial pools. In contrast, commercial pools must adhere to strict regulations of pool filtration.

Filter size

The filter size is also important for the filtration of the pool. A good guidance is to use:

  • Small filters for above-ground pools
  • Mid-range filters for pools of around 15,000 gallons
  • Big filters for pools with a volume greater than 25,000 gallons


If you are still wondering what kind of filter do I need for an acrylic pool, the recommended maintenance schedule will definitely help you narrow down your choices.

Your filter will maintain the quality of your pool water, but it is your responsibility to maintain it. Each filter type has different maintenance requirements, and you should be able to keep up with them. This goes for both cleaning techniques and frequency of maintenance.

Some filters are easier to maintain than others. Sand filters are the most straightforward to maintain, as they need to be backwashed.

Conversely, DE filters are more demanding. They require more frequent cleaning and must be refilled with DE powder.

Also, the holding capacity of the filter is an important factor that will determine the cleaning frequency. The more dirt the filter can capture and keep, the more time it can run without cleaning.

Pool Filter Maintenance
Source: / Photo Contributor: Peera_stockfoto

Filtration rate

The filtration rate represents the capacity of the filter. More specifically, it determines at what rate the filter can clean the pool water. Pool filters come with filtration rates and are divided into low, medium, and high-rate filters. 

Generally, filters with lower rates are suitable for small pools that are not used frequently and don’t accumulate a lot of debris. To calculate the exact filtration rate, you should divide the flow rate by the surface area.


The prices of pool filter systems can vary greatly. Yet, you should never compromise on quality just to save money, as this might not pay off in the long run.

It is not only about the initial cost of purchasing and installing the filtration system. You should always add the maintenance and potential savings you might have when purchasing high-quality filter systems.

Types of Pool Filters

To answer one of the most common questions we get from our clients, what kind of filter do I need for a fiberglass pool, we have to explain the options you have. There are three types of pool filters: sand, cartridge, and diatomaceous earth filters. Whichever you choose, it has to be compatible and adapted to the power of the pump.

Sand filters

As the name suggests, sand filters use sand to maintain the cleanliness of the pool water. The dirt and other debris is trapped in the sand. In our experience, they are most effective for larger tanks.

Pros Cons
Affordable High water consumption
Easy to maintain Pool water is lowered due to backwashing
Don’t clog easily Sand change is required every 5 to 8 years
Capable of removing 20-40 micron-sized debris Require sewer drainage

Cartridge filters

Cartridge filters are used for removing solid particles from pool water. They have replaceable cartridges that trap dirt and debris and need to be cleaned frequently. They are generally recommended for smaller pools and are suitable for small pumps.

Pros Cons
Easy to install and clean Require frequent cleaning
Don’t require backwashing and reduce water consumption Should be replaced annually
Can filter particles from 10 microns and above, even with pumps with low speeds
The least expensive filter types

Diatomaceous earth filter

Diatomaceous earth filters, or DE filters for short, use special powder to filter the pool water. The DE powder has a finer structure and can capture contaminant particles that other filters can’t. Because of that, they are considered filters with the highest cleaning power.

Pros Cons
Filters even the tiniest contaminants larger 2 microns Costly
May also reduce bacteria Technically complex filtration system
Durable Grid replacement is required every 2 to 3 years
Large filter area capability

How do I know my pool filter type?

If you have a pool and don’t know the type of filter it uses, there are several ways to identify it. Firstly, you can check the filter tag to get more information about your filter. You can at least find the model, size, and specifications on the information tag.

Another way to determine the filter type is to do a visual inspection. Sand filters are typically large and round and can be made from different materials, such as fiberglass, metal, and concrete.

Cartridge filters are cylindrical and have a polyester filter carriage. They are typically housed in a cylinder tank.

Lastly, the DE filters have a series of grids. They look similar and come in various sizes as sand filters.

Importance of Choosing the Right Filter System for Your Pool

Picking the best filter system for your glass wall pool is important so it can function efficiently and you can enjoy crystal-clear water. First and foremost, the type of filter system you install should be capable of removing all the impurities and suspended particulate matter from the water. Filter systems ensure water clarity and a healthy swimming environment.

Other reasons why the filter system is significantly important are:

  • Reduction of the reproduction rate of microorganisms by keeping the water moving
  • Permanent removal of filtered dirt and debris
  • Maintenance of chemical balance
  • Extension of the life of the pool equipment
  • Contribution to energy efficiency


Now that it’s clear how to choose filter system for a glass wall pool you are prepared to purchase a new one or replace your old system. Use our practical tips to pick the most efficient filter type according to your pool size and type, budget, maintenance possibilities, filter size, and filtration rate. 

If you still don’t have a glass wall pool in your backyard that you can enjoy, contact us today so we can build one for you!

Neal Moir

Neal Moir

is the owner at Titan Aquatic Exhibits and brings more than a decade in aquarium and acrylic pool wall manufacturing experience.

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